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Re: Extract Data Between Lines

by hdb (Prior)
on Apr 04, 2014 at 12:59 UTC ( #1081122=note: print w/replies, xml ) Need Help??


in reply to Extract Data Between Lines

...and here is my favorite way of doing it...

use strict; use warnings; use Data::Dumper; my @data; while(<DATA>){ push @data, { object => $1 } if /^object (.*)/; $data[-1]->{$1} = $2 if /^ (.*?) (.*)/; } print Dumper \@data; __DATA__ object network Microsoft.Lync.Host.3 host 138.108.25.111 description Help Desk Ticket #476739 object network Microsoft.Lync.Host.4 host 138.108.25.112 description Help Desk Ticket #476739 object network Microsoft.Lync.Host.5 host 138.108.25.113 description Help Desk Ticket #476739 object network Microsoft.Lync.Host.6

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[Corion]: perl -wle 'package o; use overload q("") => sub {warn "str"; ""}, bool => sub{warn "bool"; 1}; package main; my $o={}; bless $o => o; print "Yay" if ($o && !length($o))'
[Corion]: But people writing such code should document the objects they construct and why it makes sense for an object to be invisible as string while being true in a boolean context
[hippo]: That's equal parts clever and horrendous.
[Eily]: the overload version wouldn't return true with "$x" && !length $x though, I guess
[hippo]: The more I look at this code, the more $x is a plain old scalar and the more this condition will never be true. I'm calling it a bug at this point.
[hippo]: Thanks for your input which has soothed my sanity (a little)
[Corion]: Eily: Sure - if you force both things into stringy things, then you break that magic. But that would also mean that you changed the expression, as now $x = 0.00 will be true instead of false as it were before
[Corion]: Ah no, at least in my feeble experiments that doesn't change the meaning
[Corion]: We sell sanity in small packages ;)

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